JEE Advanced 2022Paper 1
- Exam
- JEE Advanced
- Year
- 2022
- Paper
- Paper 1
- Subject
- Physics
- Chapter
- Alternating Current
JEE Advanced 2022 · Paper 1 · Physics · Alternating Current
Consider an LC circuit, with inductance L = 0 . 1H and capacitance...
Consider an circuit, with inductance and capacitance , kept on a plane. The area of the circuit is . It is placed in a constant magnetic field of strength which is perpendicular to the plane of the circuit. At time , the magnetic field strength starts increasing linearly as with . The maximum magnitude of the current in the circuit is____.
Correct answer
0
Step-by-step solution
Emf induced in the circuit is
So the circuit can be rearranged as
Using Kirchhoff's law we can write
For maximum current, ,
Or
Using work energy theorem,
At {i}_\max, CEE = \dfrac{1}{2}L{i}_\max^{2} + \dfrac{{E}^{2}{C}^{2}}{2C}
Or, {i}_\max = \sqrt{\dfrac{C}{L}}E
So, {i}_\max = \sqrt{\dfrac{{10}^{- 3} \times 0 . 04}{0 . 1 \times {10}^{- 3}}}